p2p: Introduce data struct to track connection counts by network

Connman uses this new map to keep a count of active OUTBOUND_FULL_RELAY and
MANUAL connections. Unused until next commit.

Co-authored-by: Martin Zumsande <mzumsande@gmail.com>

1 files changed, 19 insertions, 0 deletions

diff --git a/src/net.h b/src/net.h
index 83fe0427d4..edff55ce7a 100644
--- a/src/net.h
+++ b/src/net.h
@@ -465,6 +465,22 @@ public:
         return m_conn_type == ConnectionType::MANUAL;
     }
 
+    bool IsManualOrFullOutboundConn() const
+    {
+        switch (m_conn_type) {
+        case ConnectionType::INBOUND:
+        case ConnectionType::FEELER:
+        case ConnectionType::BLOCK_RELAY:
+        case ConnectionType::ADDR_FETCH:
+                return false;
+        case ConnectionType::OUTBOUND_FULL_RELAY:
+        case ConnectionType::MANUAL:
+                return true;
+        } // no default case, so the compiler can warn about missing cases
+
+        assert(false);
+    }
+
     bool IsBlockOnlyConn() const {
         return m_conn_type == ConnectionType::BLOCK_RELAY;
     }
@@ -1048,6 +1064,9 @@ private:
     std::atomic<NodeId> nLastNodeId{0};
     unsigned int nPrevNodeCount{0};
 
+    // Stores number of full-tx connections (outbound and manual) per network
+    std::array<unsigned int, Network::NET_MAX> m_network_conn_counts GUARDED_BY(m_nodes_mutex) = {};
+
     /**
      * Cache responses to addr requests to minimize privacy leak.
      * Attack example: scraping addrs in real-time may allow an attacker